Dry eye symptoms in children: can we reliably measure them?

Purpose Many dry eye questionnaires are available, but these may not be suitable for paediatric eye care. The feasibility of use and repeatability of symptom questionnaires administered to children was examined. Methods Participants aged 6-15 years (n = 62; 25M:37F; 40% male) completed six questionnaires twice in random order at a single visit: Symptoms assessment in dry eye (SANDE), ocular surface disease index (OSDI), numerical rating scale (NRS), ocular comfort index (OCI, n = 30), dry eye questionnaire 5 (DEQ-5) and the instant ocular symptoms survey (IOSS). Completion time and need for assistance were recorded and relationships with age examined (Pearson correlation, independent t-test). The number of participants requiring assistance and with which items were compared (linear mixed model, pairwise test). Repeatability (coefficient of repeatability (CoR), limit of agreement, bias) and intraclass correlation coefficient (ICC) were examined. Results Completion time was <= 2 min for each individual questionnaire. Younger participants took longer to complete (r = -0.43 to -0.60, p <= 0.01), and required more assistance (p <= 0.001). Forty-eight participants required assistance with at least one questionnaire. Older children (13-15 years) only required assistance with OSDI (p <= 0.004) and NRS (p <= 0.003). Participants required more assistance with SANDE, OSDI and NRS than with DEQ-5 and IOSS (p <= 0.02) and with gritty (OSDI, 77% of participants; OCI, 100%) and foreign body sensation (NRS, 92%) items. CoR was similar for all questionnaires with no evidence of a learning effect (p > 0.05). ICC was moderate to excellent. Conclusions Dry eye questionnaires can be used reliably in paediatric eye care; more time and assistance may be required for younger children. The DEQ-5 and IOSS are recommended for use in younger age children.